Rendering-tank



(No Model.)

A. WHITE. RENDBRING TANK.

d /Zgir 653%)? Patented Sept. 18, 1894.

co. Pnofau'nia. wAs'u UNITED STATES PATENT Fries.

ALFRED WHITE, OF MINNEAPOLIS, MINNESOTA.

RENDERlNG-TANK.

SPECIFICATION forming part of Letters Patent No. 526,091, datedSeptember 18, 1894.

Application filed March 26, I894. Serial No. 505 ,051- (No model.)

To wZZ whom it may concern.-

Be it known that I, ALFRED'WHITE, a citi zen of the United States,residing at Minneapolis, in thelcounty of Hennepin and State ofMinnesota, have invented certain new and useful Improvements inApparatus for Bendering Lard, &c.; and I do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to In thesaid drawings, Figure 1 is a plan View of my apparatus. Fig. 2 is a sideelevation of the same, with some parts broken.

away, and others shown in vertical section, on the line X X of Fig. 1.Fig. 3 is a horizontal section, on the line X X of Fig. 2. Fig. 4 is avertical section, on the lines X X of Figs. "1 and 3; and Fig. 5 is avertical section, on the lines X X of Figs. 1 and 3.

Ininy apparatus, I provide a central lard containing or rendering kettleproper, a, which is supported within a water or liquid containing kettleb, with the walls of the same spaced apart to form a water jacket I).These two kettles may be formed and supported in this relative positionin any suitable way, but are preferably formed, as shown, in a singlecasting, the walls a b of which are united at the top by connecting rima. These parts a b are located within a combustion chamber 0, formed bythe shell casting c, which rests upon and is supported by the outsidecasting c of a fire-pot 0 located directly below the water-kettle b. Theinner wall 0 of the firepot is formed in any suitable way, butpreferably of corrugated castings, which are spaced apart from theexternal fire-pot wall 0 to form a dead air chamber 0 The casting a isflanged outwardly as shown at 0 to form a seat for the combustionchamber casting c, and the kettle-castings a b. The inner wall 0 of thefire-pot connects with the top of the outer wall casting c by aninclined flange or casting 0 which is depressed, as shown in Figs. 3, 4;and 5, to permit an upward passage 0 for the products of combustion fromthe firepot 0 into the combustion chamber a. The combustion chambercasting c, is provided with inwardly projecting flanges o and 0 whichco-operate with the water kettle casting b, to form a dead air space oabove the combustion chamber 0. The said casting a is also provided withan inwardly projecting vertical flange 0 which joins with the exteriorof the water kettle casting b, to form an external partition in thecombustion chamber c, on one side of the outlet or chimney flue 0 whichis secured to the exterior of the casting c, in any suitable way. Thepassage 0 from the fire-pot c is located at the corner or part thereofadjacent to the partition 0 on the sidethereof opposite the outlet flue.Hence, the products of combustion must on ter the combustion chamber 0,at a point therein most remote from the outlet flue 0 and will have tocirculate entirely around the water kettle b. The fire-pot c is fittedwith a suitable grate c and provided with a fuelinlet 0 fitted with afuel door 0 The whole structure rests on feet 0 or other suitable baseor support.

The top flange a connecting the parts a Z), is fitted with a removablevalved funnel d d, for filling the space I) With water or other liquid,to form the water-jacket around the rendering kettle a. A steampipe dextends from said flange a to the outlet flue 0 for permitting theescape of steam from the water-kettle 6 into the outlet flue 0 whichconstruction affords a safety device, for avoiding any excess ofpressure in the water-kettle, and affording a forced draft on the fire.

The rendering kettle a, is fitted with a sectional cover f f f of whichthe section f is fixed to the top of the casting a b, at the portion ofthe same nearest the outlet flue 0 The section f is hinged to thesection f, as shown at f and the section f is hinged to the section f,as shown at f. The outer section f will therefore turn on the section fand both will turn on the hinges f to expose more or less of the top ofthe rendering kettle a, at will. The lid section f is provided with afinger piecef The water-kettle b is fitted with a valved dischargefaucet h h, extending to the exterior of the combustion chamber castingc and fitted, inward of the hand-valve h, with a vertical water-glass hfor indicating the water-level in the chamber b. The rendering kettle ais provided with adraw-oflf or discharge faucet is, projecting outwardthrough the water-kettle band the casting c and fitted with a hand-valve70, for drawing oil the rendered material.

From the fixed cover section f, to the outlet flue extends a fume-pipem, which permits, and, under the action of the draft in the outlet flue,effects the escape of the fumes from the rendering kettle. In otherWords, the pipe m serves as a fume drainer.

The combustion chamber casting c is provided with one or more doors p,which serve to afford access to the combustion chamber 0, and theconnections passing through the same, for cleaning out the said chamber,applying the said parts, such as the faucets h p and 7c, and makingrepairs thereto or changes therein, as may be required.

Having regard now to the action, the chamber 11 is filled with water orother liquid, and is kept full therewith to a point above the flange c".The lard, or other material to be rendered, is placed in the kettle aand flre is started in the fire-pot c of the furnace. The products ofcombustion from the fire-pot will come directly into contact with thebottom of the water-kettle b, and the burning gases therefrom willcirculate around and come in contact with the sides of the saidwater-kettle b, in their progress through the combustion chamber 0, fromthe fire-pot passage 0 to the outlet flue 0 The Water in the chamber bwill be thereby rapidly heated, and-under the circulation therein, theheat therefrom will be equally distributed onto the rendering kettle a.products of combustion can never come in contact with the renderingkettle. The rendering action will therefore be produced entirely fromthe hot-water in the chamber 1). The lard or other material beingrendered can never be burned; and hence, the finished productwill haveits natural and agreeable flavor and be entirely free from the offensivequalities due to burning or scorching. Moreover,

owing to the even distribution of the heat, the rendering action isconsiderably improved and an increased prod net is obtainable in any Thefire or the burning given time. The great improvement, however, is thepreservation of the natural flavor of the lard, tallow, or othermaterials being rendered, free from the oitensive effects of burning orscorching.

In respect to the apparatus, it is obvious that the parts are easilytaken down or put together, on account of the peculiar construction. Thecastings a a b, which form the rendering kettle and the water-kettle areremovable from the flange c, or insertible into position inside thecombustion chamber casting 0. The combustion chamber casting c isremovable from the external fire-pot casting c or securable thereto inany suitable way; and the flre-pot castings c are removable from theinterior of the external firepot casting 0 or insertible therein, atwill. Likewise, the faucets h and 70, and the steampipe d and fume pipem are all removable from the respective parts, to which they areapplied. Hence, the whole apparatus may be readily knocked down forpackage and shipment, or be put together into working position, at will.

What I claim, and desire to secure by Letters Patent of the UnitedStates, is as follows:

1. The combination with the furnace having the combustion chambercasting 0', provided with the horizontal flanges e and c and thevertical flange 0 of the castings a a b, constructed and arranged asdescribed, with respect to each other and the said casting c, to formthe rendering kettle a, the water kettle b and the combustion chamber 0,the firepot 0 provided with the passage 0 to said combustion chamber 0,and the outletflue c, all arranged and operating substantially asdescribed.

2. The combination with the furnace, of the rendering kettle a and thewater-kettle b, supported within the combustion chamber, the outlet flue0 the steam-pipe d from the water-chamber b to said flue and the fumedrain pipe m, from the rendering kettle to said flue, all substantiallyas and for the purpose set forth.

In testimony whereof I atlix my signature in presence of two witnesses.

ALFRED WHITE. Witnesses:

JAS. F. WILLIAMSON, EMMA F. ELMORE.

